---
title: timeIntervalBetween1970AndReferenceDate
framework: foundation
role: symbol
role_heading: Type Property
path: foundation/date/timeintervalbetween1970andreferencedate
---

# timeIntervalBetween1970AndReferenceDate

The number of seconds from 1 January 1970 to the reference date, 1 January 2001.

## Declaration

```swift
static let timeIntervalBetween1970AndReferenceDate: Double
```

## See Also

### Getting Time Intervals

- [timeIntervalSince(_:)](foundation/date/timeintervalsince(_:).md)
- [timeIntervalSinceNow](foundation/date/timeintervalsincenow.md)
- [timeIntervalSinceReferenceDate](foundation/date/timeintervalsincereferencedate-swift.property.md)
- [timeIntervalSince1970](foundation/date/timeintervalsince1970.md)
- [timeIntervalSinceReferenceDate](foundation/date/timeintervalsincereferencedate-swift.type.property.md)
- [Date.Stride](foundation/date/stride.md)